VOLTWORKS VK-300A User manual

Brand: VOLTWORKS

Model: VK-300A

Category: Cool boxes

Type: User manual

MODEL: VK-300A

Warning: This manual contains important safety and

operating instruction. Please read it carefully before use

the unit.

USER'S MANUAL

300W Power Inverter

A. INSTRUCTION

The VOLTWORKS Power inverter product line is used for back-up power. The power

inverter converts DC (direct current/car battery) power into AC (alternating current)

power that can be used for running a wide variety of tools and appliances. This inverter is

perfect for providing mobile power in cars, boats and work trucks. The inverter can also

be utilized as a back-up source of electricity in the event of an electrical failure or for

several off-grid applications such as camping or in your RV.

B. Please read this instruction manual carefully and make sure your inverter is

installed properly before using.

C. Warning and safety

1) Read the manual before connecting this inverter and keep it for future reference.

2) Don't put the inverter under sunlight, near a heating source, wet or humid environment.

3) The case housing of inverter will be hot while using. Do not allow flammable materials

to contact the inverter, such as clothing, sleeping bags, carpet or any other flammable

materials. The heat from the inverter can damage these items.

4) The power inverter is designed to be used with a negative ground electrical system!

Don't use with positive ground electrical systems (the majority of modern

automobiles, RVs, trucks and boats are negative ground).

5) Do not disassemble the unit: it may cause fire or electric shock.

6) This device should only be serviced by a qualified technician. This item does not have

any serviceable parts.

7) Prevent body contact with grounded surfaces such as pipes, radiators, ranges, and

refrigerator enclosures during installation.

8) Do not operate the inverter if under the influence of alcohol or drugs. Read warning

labels on prescriptions to determine if your judgement or reflexes are impaired while

taking drugs. If there is any doubt, do not operate the inverter.

9) People with pacemakers should consult their physician(s) before using this product.

Electromagnetic fields in close proximity to a pacemaker could cause interference to

or failure of the pacemaker.

10) Keep the inverter well-ventilated. Do not place any objects on top of or next to the

inverter or allow anything to cover the cooling fans; doing so can cause the inverter to

overheat, causing a potential fire hazard and/or damage to the inverter. Leave

adequate ventilation space underneath the inverter as well; thick carpets or rugs can

obstruct air flow, causing the inverter to overheat.

11) Avoid unintentional starting. Be sure the switch is in the OFF position when not in use

and before plugging in any appliance.

12) Keep inverter away from children. Don't install the inverter where it is accessible to

children.

13) The power inverter will output the same AC power as utility power, please treat the AC

outlets as carefully as you would your home AC outlets. Do not put anything other

than an electrical appliance into the output terminal. It may cause shock or fire.

14)Disconnect the battery and inverter when not in use.

Note: Performance of this unit may vary depending on the available battery power or

appliance wattage.

1. 2.

DC Input Voltage

Output Wave Form

Output Power

Output Voltage

Surge Power

Over Load power

Efficiency

No Load Current

Battery Low Alarm

Battery Low Shutdown

Input Over Voltage Shutdown

Operating Temperature

Over Temperature Protection

FAN

USB Output

Internal DC Input Fuse

Power Switch

Cigarette Lighter Cable

Dimensions (LxWxH)

Net Weight

D. Features：

Model

(Automatic Recovery/Shutdown)

1)Adopt advanced MPU control.

12V (9.8-16V)

Modified sine wave

300W

AC110-120V 60Hz

600W for 40 milsec

400W

about 90%

0.25A

DC 9.8 ± 0.5V

32-113° F

149° F ± 41° F

Temperature control 104° F± 41° F

Must Be Fitted, Use 30A Maximum

ON/OFF Control

YES

5.63” x 3.42” x 1.97”

1.2 lb

DC 9.5 ± 0.5V

(Automatic Recovery at 12.5VDC)

DC16±0.5 V

(Automatic Recovery at 14VDC)

5 VDC, Max 4.8A(Dual 2.4A)

Automatic identification charging IC

Warning: The warnings, cautions, and instructions discussed in this instruction manual

cannot cover all possible conditions and situations that may occur. It must be understood

by the operator that common sense and caution are factors which cannot be built into

this product, but must be supplied by operator. Guard against electric shock. Do not

open the metal case; risk of electric shock.

Data

F. USING THE POWER INVERTER

1. Check the output voltage and capacity of the battery. The battery (s) should match

the voltage of the inverter and have enough capacity for the load.

2. Insert the cigarette plug into the car cigarette socket and ensure well connected.

3. Press the power switch button on your inverter and a green LED will light up

indicating that the inverter is on.

4. Before plugging anything into your inverter, make sure the appliance you are trying

to power is shut OFF, then plug it into the AC outlet of your inverter and power on

your appliance.

5. Once finished using the inverter, turn off your electrical appliance and the inverter.

The indicator lights should be off.

AC outlet

USB ports

LED display (battery input

voltage, fault codes display)

Power indicator

Fault indicator

Warning: The car cigarette outlet usually has current limit requirements. It is

suggested that the continuous load power should not exceed 100W when the

original cigarette holder is supplied, otherwise the car built-in fuse may be burned.

If more power requested, a special cigarette outlet should be supplied to connect

directly from battery.

G. USING THE USB

The inverter provides dual USB ports and stable 5V DC to the external device, the

total maximum current is 4.8A, and the maximum output current of a single USB

port is 2.4A, which can directly supply or charge a portable device with a USB

interface.

USB ports built-in automatic charging identification IC, support various charging

protocols.

H. BATTERY

Battery operating time depends on battery capacity and load. The formula for

operating time is: battery capacity divided by the value of the load divided by

battery voltage times 1.10%. For example, using the numbers from above, the

battery specification is 12V, 100Ah capacity and the load is 180W. Take battery

capacity 100Ah *12/ 180≈6.6 hours of run time if you fully deplete the battery. This

is NOT recommended. Deep cycle batteries last longer when they are only

depleted to 50% of capacity.

I. SOFT START TECHNOLOGY

The soft start technology built into this inverter protects the unit from delivering

too much AC power at once by gradually increasing the AC voltage pushed out. To

make sure that you are utilizing this feature, turn on the appliance being used

before turning on the inverter. This is especially necessary for equipment that has

an inductive load or electrical motor.

J. OUTPUT VOLTAGE & WAVEFORM

The electrical waveform output of this inverter is Modified sine wave, which has the

same quality as utility and/or domestic power. This type of waveform is suitable for

most electrical devices, appliances and tools. This pure sine wave unit provides

more capabilities than modified sine wave inverters because it is a cleaner form of

power. The pure sine wave also effectively reduces the noise produced while using

appliances.

K. PROTECTIONS IN THE INVERTER

1. Input under-voltage alarm(LO): When the input DC voltage is lower than 9.8V, LED

display will indicate “LO”, the buzzer will whistle intermittently to remind that the

inverter will go into the under voltage protection.

2. Over voltage protection(HI): The inverter will automatically shut down when the

input DC voltage is higher than 16V. LED display will indicate “HI”. The buzzer will

whistle continuously and the green light is off, red light is on. Please turn off the

inverter and adjust the input voltage to the admissible range.

E. Parts list

Cigarette

Lighter

Switch

Cooling fan

If all of the above methods have been tried, the product still not work properly.

The internal circuit of the product may be out of order. Please return the

product to the supplier for maintenance.

Do not use it when the

battery is charging. Check

the rated voltage of the

battery and make sure that it

is in the allowable range of

the input voltage

1. The switch is off.

2. The battery lead isn't

connected well

Cut off the load and let it

cool naturally for 10 to

30 minutes. Restart it after it

resumes to normal

temperature. The load

power is too large, reduce

the total load power to the

range of rated power. Avoid

blocking the vent and

improve the ventilation

condition. Reduce the

ambient temperature.

1. Turn on the power switch.

2. Check the cables and

make sure they are tightly

connected.

3. Overload protection(OL)n: The inverter will automatically shut down when the load

is higher than the rated power. LED display will indicate “OL”. The buzzer will

whistle continuously. Turn off the inverter and resume to normal operation after

taking away the excessive load.

4. Short-circuit protection: The AC output will be automatically shut down when short

circuited. And LED display will indicate “OL” It will automatically reset after the

problem is solved.

5. Thermal protection(OH): The unit will get hot during operation. If the temperature is

higher than 149°F, the inverter will automatically shut down. LED display will

indicate “OH”Then the buzzer will whistle continuously and the green light is off,

red light is on. Please turn off the inverter, and continue using it after the

temperature goes back to normal naturally. Meanwhile find out the factors causing

the fault, such as ventilation, ambient temperature, vent, load power etc. It can

avoid similar issues from happening again.

Reduce a load power,

or turn on the appliance

first, then turn on the

inverter.

1. Use a true RMS multimeter

to measure, such as the

model FLUKE 177/179.

2.Try to maintain the input

voltage in the range of

rated power

3.Change the battery of the

multimeter then test again.

1. RMS Multimeter

measurement error

2. The battery power of RMS

Multimeter is low.

The input voltage is too high

or too low

While using with

TV or audio, there

is snowflake on

the screen or noise

from the audio.

1. Keep the inverter far from

antenna.

2. Use screened antenna.

5. 6.

L. Troubleshooting Tips

M. WARRANTY

This product is designed using the most modern digital technology and under very

strict quality control and testing guidelines.If,however, you feel this product is not

performing as it should, please contact us: usvoltworks@gmail.com

We will do our best to resolve your concerns. If the product needs repair or

replacement, make sure to keep your receipt/invoice, as that will need to be sent

back along with the package and prepaid to VOLTWORKS. You have a full 18

months warranty from date of purchase.

The following situations will void warranty:

1. The box is distorted, damaged or changed, and interior parts damaged because of

an exterior hit or drop not reported at time of delivery.

2. Connect the DC power incorrectly reversing the polarity.

3. Dismantled or repaired the unit by an unauthorized person.

4. The unit was damaged by incorrect installation or operating method.

To find out where to buy any of our products, you may also e-mail:

Customer Service Contact: usvoltworks@gmail.com

VOLTWORKS VK-300A User manual

Brand: VOLTWORKS

Model: VK-300A

Category: Cool boxes

Type: User manual

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VOLTWORKS VK-300A User manual

VOLTWORKS VK-300A User manual

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